Cash Acme B121 PEX adapter connects 1/2" PEX tubing to 1/2" copper pipe using a crimp barb and female sweat connection. The fitting is manufactured from solid brass to provide strength durability and corrosion resistance. Designed for secure PEX barb insertion with copper crimp ring installation and soldered copper pipe connection. Straight adapter body allows reliable transition between PEX tubing and sweat copper pipe. Supplied as a pack of 10 brass plumbing adapter fittings.